Finding the Fourth Proportional to 76,443.61, 114,654.27 and 20,287.12

Step by Step Solution

1. Step 1: Write the proportion equation
   76,443.61 : 114,654.27 = 20,287.12 : x
2. Step 2: Convert to fraction form
   76,443.61/114,654.27 = 20,287.12/x
3. Step 3: Cross multiply
   76,443.61x = 114,654.27 × 20,287.12
4. Step 4: Simplify right side
   76,443.61x = 2,326,004,934.00
5. Step 5: Solve for x
   x = 2,326,004,934.00/76,443.61
6. Step 6: Final answer
   x = 30,427.72